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//---------------------------------------------------------------------------//
// $Id: x03.java,v 1.15 2005/07/03 12:43:39 andrewross Exp $
//---------------------------------------------------------------------------//
//---------------------------------------------------------------------------//
// Copyright (C) 2001 Geoffrey Furnish
// Copyright (C) 2001, 2002 Alan W. Irwin
// Copyright (C) 2004 Andrew Ross
//
// This file is part of PLplot.
//
// PLplot is free software; you can redistribute it and/or modify
// it under the terms of the GNU Library General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// PLplot is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public License
// along with PLplot; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//---------------------------------------------------------------------------//
//---------------------------------------------------------------------------//
// Implementation of PLplot example 3 in Java.
//---------------------------------------------------------------------------//
package plplot.examples;
import plplot.core.*;
import java.lang.Math;
import java.text.*;
class x03 {
public static void main( String[] args )
{
x03 x = new x03( args );
}
public x03( String[] args )
{
PLStream pls = new PLStream();
NumberFormat nf = NumberFormat.getNumberInstance();
int i, j;
double dtr, theta, dx, dy, r;
double[] x0 = new double[361];
double[] y0 = new double[361];
double[] x = new double[361];
double[] y = new double[361];
dtr = Math.PI / 180.0;
for( i = 0; i <= 360; i++ )
{
x0[i] = Math.cos(dtr * i);
y0[i] = Math.sin(dtr * i);
}
// Parse and process command line arguments.
pls.parseopts( args, PLStream.PL_PARSE_FULL | PLStream.PL_PARSE_NOPROGRAM );
// Initialize plplot.
pls.init();
// Set up viewport and window, but do not draw box.
pls.env(-1.3, 1.3, -1.3, 1.3, 1, -2);
for (i = 1; i <= 10; i++) {
for (j = 0; j <= 360; j++) {
x[j] = 0.1 * i * x0[j];
y[j] = 0.1 * i * y0[j];
}
// Draw circles for polar grid.
pls.line(x, y);
}
pls.col0(2);
for (i = 0; i <= 11; i++) {
theta = 30.0 * i;
dx = Math.cos(dtr * theta);
dy = Math.sin(dtr * theta);
// Draw radial spokes for polar grid.
pls.join(0.0, 0.0, dx, dy);
String text = nf.format(theta);
// Write labels for angle.
//Slightly off zero to avoid floating point logic flips at 90 and 270 deg.
if (dx >= -0.00001)
pls.ptex(dx, dy, dx, dy, -0.15, text);
else
pls.ptex(dx, dy, -dx, -dy, 1.15, text);
}
// Draw the graph.
for (i = 0; i <= 360; i++) {
r = Math.sin(dtr * (5 * i));
x[i] = x0[i] * r;
y[i] = y0[i] * r;
}
pls.col0(3);
pls.line(x, y);
pls.col0(4);
pls.mtex("t", 2.0, 0.5, 0.5, "#frPLplot Example 3 - r(#gh)=sin 5#gh");
// Close the plot at end.
pls.end();
}
}
//---------------------------------------------------------------------------//
// End of x03.java
//---------------------------------------------------------------------------//
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